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plug (plŭg)
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n.
1. An object, such as a cork or a wad of cloth, used to fill a hole tightly; a stopper.
2. A dense mass of material that obstructs a passage.
3. A usually cylindrical or conic piece cut from something larger, often as a sample.
4. Electricity
a. A fitting, commonly with two metal prongs for insertion in a fixed socket, used to connect an appliance to a power supply.
b. A spark plug.
5. A hydrant.
6.
a. A flat cake of pressed or twisted tobacco.
b. A piece of chewing tobacco.
7. Geology A mass of igneous rock filling the vent of a volcano.
8. Informal A favorable public mention of a commercial product, business, or performance, especially when broadcast.
9. Slang Something inferior, useless, or defective, especially an old, worn-out horse.
10. Slang A gunshot or bullet: a plug in the back.
11. A fishing lure having a hook or hooks.
v. plugged, plug·ging, plugs
v. tr.
1. To fill (a hole) tightly with or as if with a plug; stop up.
2. To insert (something) as a plug: plugged a cork in the bottle.
3. To insert in an appropriate place or position: plug a quarter into the parking meter; plugged the variables into the equation.
4. Slang
a. To hit with a bullet; shoot.
b. To hit with the fist; punch.
5. Informal To publicize (a product, for example) favorably, as by mentioning on a broadcast: authors who plug their latest books on TV talk shows.
v. intr.
1. To become stopped up or obstructed: a gutter that plugged up with leaves.
2. Informal To move or work doggedly and persistently: “You may plug along fifty years before you get anywhere” (Saul Bellow).
Phrasal Verbs:
plug in
1. To connect (an appliance) to an electrical outlet.
2. To function by being connected to an electrical outlet: a power drill that plugs in.
3. Slang To cause (someone) to use a computer network, the internet, or an electronic device.
4. Slang To become informed about or involved with: was eager to plug in to the campus social scene.
plug into
1. To connect or be connected in the manner of an electrical appliance: The local system is plugged into the national telephone network. This computer plugs into a data bank.
2. Slang To cause (someone) to use a computer network, the internet, or an electronic device.
3. Slang To cause to be informed about or involved with: connoisseurs who are plugged into the current art scene.

[Dutch, from Middle Dutch plugge.]

plugger n.

The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
 

Indo-European & Semitic Roots Appendices

    Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:

    Indo-European Roots

    Semitic Roots

    The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.

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